Horseshoe calk



July 7, 1925.

L. V. STONE HORSESHOE OALK Filed Aug. 22, 1924 gwwml'oz Oflozmq Patented July 7, 1 925.

LOBEN V. STONE, F WATERTOWN, NEW YORK.

nonsnsnon CALK.

Application filed August 22, 1924. SerialNo. 733,544.

To all whom it may concern:

Be it known that I, LOREN V. STONE, a

citizen of the United States, residing at W'atertown, in the county of Jefferson and 6 State of New York, have invented certain new and useful Improvements in Horseshoe Calks, of which the following is a specification, reference being had therein to the accompanying drawing;

This invention relates to horseshoe calks, and the principal object is to provide an improved form of calk, the specific advantages of which will appear in the further description thereof.

In the accompanying drawing, forming part of this application, and inwhich like reference characters indicate like parts:

Figure 1 is a front elevation of my im- I proved form of calk;

Fig. 2 is a side elevation; Fig. 3 is a rear elevation; and Fig. 4 is a top plan view. Y 1 represents the shank of the calk, which is of the tapered friction type common in theart, and ,2 is the blade, made preferably of V-shape, or atleast the walls of the two halves of the blade are disposed at substantially right angles to each other ,butvpreferably slightly acute, their inner walls being 39 slightly inclined by converging towards the base of the shank as clearly seen in Fig. 3.

Intermediate of the shank and blade portion of the calk and upon the back side thereof is formed thetransverse semi-circularly shaped shoulder 3, the same extending entirely across the blade of the calk, and I the upper ends of which shoulder are rounded off as at 4 upon either side of the base of the shank to form natural entrance ways for the application of the ordinary extractor 4.0 either from the front or rear of the calk. The ends" of the shoulder 3" are in the same plane and form a continuation ofa flattened portion 5, forming vertical side walls externally of the rearmost edge terminations of the shank. These side walls are comparatively wide in their uppermost portion as shown in Figure 2 and taper to comparatively nothing at the lower corners of the blade. The roof 6 of the cutout portion of the calk is inclined slightly from the lower edge of the shoulder 3, thus formed a substantial union between the blade and shank of the calk and one not readily worn away in the event of an excessively used calk, affording at all times ample metal at the base of the shank-for extraction of the calk,

Having thus described my invention, what I claim and desire to secure by LettersPatent, is: v

The combination with a V-shaped' calk of the type described having a tapered shank, of'a semi-circularly shaped shoulder extending wholly across the rear of the blade of the calk at the base of the shank,

the ends of said shoulder forming a groovelike depression in either side of the calk as viewed from the front thereof.

LOREN v. STONE... 

